Computed tomography sound velocity reconstruction using incomplete data
Resource
Ultrasonics, Ferroelectrics and Frequency Control, IEEE Transactions on
Journal
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control
Journal Volume
51
Journal Issue
3
Pages
329-342
Date Issued
2004-03
Author(s)
S.-W. Huang
Abstract
An approach based on limited-angle transmission tomography for reconstruction of the sound velocity distribution in the breast is proposed. The imaging setup is similar to that of x-ray mammography. With this setup, the time-of-Hight data are acquired by a linear array positioned at the top of the compressed breast that both transmits and receives, and a metal plate is placed at the bottom as a reflector. The setup allows acoustic data acquisition for simultaneous B-mode image formation and the tomographic sound velocity reconstruction. In order to improve the sound velocity estimation accuracy, a new reconstruction algorithm based on a convex programming formulation has been developed. Extensive simulations for both imaging and time-of-flight data based on a 5-MHz linear array were performed on tissues with different geometries and acoustic parameters. Results show that the sound velocity error was generally 1-3 m/s, with a maximum of 5.8 m/s. The radii of the objects under investigation varied from 2 to 6 mm, and all of them were detected successfully. Thus, the proposed approach has been shown to be both feasible and accurate. The approach can be used to complement conventional B-mode imaging to further enhance the detection of breast cancer.
SDGs
Other Subjects
Acoustic wave velocity; Algorithms; Biological organs; Computer simulation; Mammography; Medical imaging; Oncology; Tumors; Ultrasonic applications; X rays; Limited angle transmission tomography; Sound velocity reconstruction; X-ray mammography; Computerized tomography; algorithm; article; comparative study; echography; echomammography; evaluation; image processing; image quality; instrumentation; methodology; reproducibility; sensitivity and specificity; transducer; Algorithms; Image Processing, Computer-Assisted; Phantoms, Imaging; Reproducibility of Results; Sensitivity and Specificity; Transducers; Ultrasonography; Ultrasonography, Mammary
Type
journal article